WO2024064099A1 - Onduleur à liaison de stockage d'énergie isolé galvaniquement - Google Patents

Onduleur à liaison de stockage d'énergie isolé galvaniquement Download PDF

Info

Publication number
WO2024064099A1
WO2024064099A1 PCT/US2023/033078 US2023033078W WO2024064099A1 WO 2024064099 A1 WO2024064099 A1 WO 2024064099A1 US 2023033078 W US2023033078 W US 2023033078W WO 2024064099 A1 WO2024064099 A1 WO 2024064099A1
Authority
WO
WIPO (PCT)
Prior art keywords
bus
electrical power
power system
galvanic
circuit breakers
Prior art date
Application number
PCT/US2023/033078
Other languages
English (en)
Inventor
Andrew Williams
Ben GULLY
Morten Pederson
Original Assignee
SPOC Automation, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SPOC Automation, Inc. filed Critical SPOC Automation, Inc.
Publication of WO2024064099A1 publication Critical patent/WO2024064099A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Definitions

  • a vessel on the open seas is acted upon by external forces produced by wind, tides and waves.
  • Dynamic positioning (DP) systems are known which enable a vessel that approaches a fixed offshore platform, such as an oil rig, windmill, etc., to avoid collision with the platform.
  • a DP vessel will approach an offshore platform, get close without colliding with the platform, make continuous measuring of its position and the external forces acting on the vessel, and automatically compensate for any charges in position using its thruster(s) and stabilizers to maintain a fixed position or station.
  • Standards for such DP systems include DP-1 providing only dynamic positioning, and DP-2 providing redundancy such that a single failure does not result in the loss of station maintenance.
  • Many offshore platforms only permit vessels with a DP system to approach the platform and often a DP-2 system is required.
  • a DP vessel servicing an offshore platform will have a power plant and a large electrical system capable of operating all shipboard systems.
  • the owners of offshore platforms have disallowed service vessels from using a closed bus tie due to fear of blackout.
  • An aspect of at least one of the embodiments described herein is to provide full redundancy of an electrical system of an offshore service vessel while maintaining DP-2 classification.
  • Another aspect of at least one of the embodiments is to provide a circuit that may be used for storing and transferring energy between galvanically isolated AC bus systems on offshore service vessels while the AC bus tie is open, while maintaining DP-2 classification.
  • Yet another aspect of at least one of the embodiments is to require lower power storage in a battery than in a system that does not allow transfer of power between isolated buses in a DP-2 system.
  • a further aspect of at least one of the embodiments is to provide a power distribution system able to be retrofitted into existing vessels, as well as new vessels.
  • Yet another aspect of at least one of the embodiments is to connect at least one energy storage device such as a battery system to each side of two AC buses, while transferring generator power from one AC bus to another, galvanically isolated AC bus.
  • at least one energy storage device such as a battery system
  • a further aspect of at least one of the embodiments is to prevent a zero voltage condition on one bus to propagate to another bus while allowing power to transfer between buses via a galvanic isolator(s).
  • Yet another further aspect of at least one of the embodiments is to provide a power distribution system that enables a single generator to power all loads of a marine vessel during DP-2 operation.
  • a further aspect of at least one of the embodiments is to permit running a smaller generator on each isolated bus with the bus tie open and be able to transfer power to the other isolated bus, with or without energy storage, such that a worst case single point failure would only result in half of the ship's AC bus losing power.
  • Yet another further aspect of at least one of the embodiments is to enable batteries to be sized much smaller than in a system that does not allow transfer of power between the buses through inverters.
  • a further aspect of at least one of the embodiments is that the batteries, if included, can be used in the spinning reserve calculations for each bus.
  • Yet another aspect of at least one of the embodiments is to provide significantly enhanced operational capabilities for marine vessels in, e.g., IMO Class DP 2, etc.
  • FIGS. 1-3 are a circuit diagrams of embodiments of a galvanically isolated energy storage - tie inverter.
  • FIGS 1-3 illustrate three embodiments of a system, connected to a typical offshore service vessel one-line, which serves the dual purpose of connecting energy storage devices such as battery systems to each side of a bus, as well as the ability to transfer generator power from one AC bus to another AC bus while the AC bus tie is open.
  • energy storage devices such as battery systems
  • the transformers and inverters galvanically isolate the two AC bus systems. Therefore, a zero voltage condition on one bus cannot propagate to the other bus.
  • energy storage is included, many different configurations are possible. In all cases, it is preferred that energy storage is connected onto a common DC link bus and that DC bus is then connected to two or more DC/AC inverters that feed back to the ship's AC bus system. This allows both stored energy, e.g., in batteries, as well as energy from one AC bus to be transferred to the other AC bus while galvanically isolated and with the AC bus tie open.
  • optional DC to DC converters are illustrated. Pairing of these optional DC to DC converters with energy storage helps maintain the common DC link bus voltage at appropriate levels to maintain the correct AC voltage output to each of the galvanically isolated buses. These DC to DC converters also allow the operator to precisely control the charging and discharging of batteries.
  • the illustrated embodiments allow for the energy storage on a vessel to be immediately deployed on either AC bus while the AC bus tie is open.
  • energy storage may be utilized for spinning reserve calculations on both bus systems, not just one. This allows vessel operators to save fuel and maintenance costs by running a single generator on one bus or two smaller generators, one on each bus, utilizing the energy storage as spinning reserve.
  • a single generator or two smaller generators can provide power to both isolated bus systems through the inverters.
  • the inverter sizing takes into account both the required power transfer between buses as well as the output and charging capabilities of the energy storage if included.
  • first, second, third and fourth generators G1- G4 have outputs of alternating current (AC) and are connected by first, second, third and fourth generator circuit breakers 11-14 at the outputs of the first, second, third and fourth generators, respectively, to first and second AC buses 15, 16 only during non-critical operations (Not DP-2 etc.).
  • the first and second generator circuit breakers 11 , 12 connect the first and second generators G1 , G2 to the first AC bus 15 and the third and fourth generator circuit breakers 13, 14, connect the third and fourth generators G3, G4 to the second AC bus 16.
  • AC bus 15 is connected to loads 18 that may use AC power directly from bus 15 connected to generators G1 or G2 or power from bus 16 after conversion (through galvanic isolators and inverters) AC to DC to AC.
  • AC bus 16 is connected to loads 19 that may use AC power directly from bus 16 connected to generators G3 or G4 or power from bus 15 after conversion (through galvanic isolators and inverters) AC to DC to AC.
  • a normally open bus-tie circuit breaker 21 connects the first and second AC buses 15, 16.
  • First and second galvanic isolators 24, 25 are connected together by (first) DC bus 26 and respectively connected to the first and second AC buses 15, 16 by first and second isolator connection circuit breakers 27, 28.
  • bus-tie circuit breaker 21 is open, the first and second AC buses 15, 16 are isolated from one another which prevents a failure on one bus from causing a failure on the other bus.
  • both isolator connection circuit breakers 27, 28 are closed, the first and second AC buses 15, 16 are connected by the first and second galvanic isolators 24, 25 which are bi-directional.
  • any of the generators G1-G4 can supply power to either of the loads 18, 19 regardless of whether the bus-tie circuit breaker 21 is open or closed, provided both isolator connection circuit breakers 27, 28 are closed.
  • Each of the DC busses 26,40 shown in FIG 1 , 2, 3, may have multiple battery systems (not shown) connected to each bus and may have additional contactors or circuit breakers to provide additional isolation between power sources and the AC buses 15,16.
  • DC bus 26, connecting first and second galvanic isolators 24, 25, optionally may be connected to energy storage 30, such as a battery, by a DC/DC converter 31 if required by different voltages on the DC bus 26 and battery 30.
  • a single generator can be operated with the bus-tie circuit breaker 21 open and have power available from battery 30 on both AC busses 15, 16.
  • the single generator can provide power to both loads 18, 19 which are isolated by the first and second galvanic isolators 24, 25 when the bus-tie circuit breaker 21 is open. In this embodiment, a worst case single point failure would only result in half of the ship's AC bus losing power.
  • the first and second galvanic isolators 24, 25 also allow the operator to precisely control charging and discharging of energy storage 30.
  • Each of the first and second galvanic isolators 24, 25 may include a transformer 32 or 33.
  • the system may also include inverters 34, 35 that also provide some galvanic isolation.
  • Each of the inverters 34, 35 may be an insulated-gate bipolar transistor inverter or technology with similar capability that is sized by taking into account both the required power transfer between buses as well as the output and charging capabilities of the battery 30.
  • the power storage in battery 30 can potentially be smaller than in a system that does not allow transfer of power between first and second AC buses 15, 16 through first and second galvanic isolators 24, 25 and inverters 34, 35.
  • battery 30 can be used in the spinning reserve calculations for each bus.
  • third and fourth galvanic isolators 36, 37 and third and fourth AC/DC inverters 38, 39 are connected together by a second DC bus 40 and respectively connected to the first and second AC buses 15, 16 by third and fourth isolator connection circuit breakers 41 , 42.
  • a second battery 43 may be connected to DC bus 40 by a second DC/DC converter 44, if required by different voltages on the DC bus 40 and battery 43.
  • FIG. 3 An alternative way of making the dual galvanically isolated connections to the first and second AC busses 15, 16 is illustrated in FIG. 3. Instead of providing third and fourth isolator connection circuit breakers 41 , 42 to connect the third and fourth galvanic isolators 36, 37 to the first and second AC buses 15, 16, the third and fourth galvanic isolators 36, 37 are connected by the same first and second isolator connection circuit breakers 27, 28 that connect the first and second galvanic isolators 24, 25 to the first and second AC buses 15, 16.
  • the vessel owner will be able to run either a single generator or no generators with the bus tie open and have redundant power available on each bus. If the vessel is run on batteries only this will be only for a limited amount of time before recharging is necessary and this will be based on the KWH capacity of the batteries.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

Un navire comprend des générateurs CA et des charges CA connectées respectivement par des disjoncteurs à des premier et second systèmes de bus CA. Des premier et second isolateurs galvaniques, qui comprennent des onduleurs CA/CC bidirectionnels sont connectés les uns aux autres et connectés respectivement aux premier et second systèmes de bus. Par conséquent, la puissance peut être transférée vers et depuis de multiples systèmes de bus CA isolés galvaniquement et vers et depuis des systèmes de stockage d'énergie CC tout en maintenant les exigences DP-2.
PCT/US2023/033078 2022-09-19 2023-09-18 Onduleur à liaison de stockage d'énergie isolé galvaniquement WO2024064099A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202263407962P 2022-09-19 2022-09-19
US63/407,962 2022-09-19

Publications (1)

Publication Number Publication Date
WO2024064099A1 true WO2024064099A1 (fr) 2024-03-28

Family

ID=90243221

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2023/033078 WO2024064099A1 (fr) 2022-09-19 2023-09-18 Onduleur à liaison de stockage d'énergie isolé galvaniquement

Country Status (2)

Country Link
US (1) US20240097453A1 (fr)
WO (1) WO2024064099A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9745038B2 (en) * 2014-07-11 2017-08-29 General Electric Company DC power system for marine applications
US20170373502A1 (en) * 2015-01-15 2017-12-28 Siemens Aktiengesellschaft Power distribution on a vessel
US20170373498A1 (en) * 2015-01-23 2017-12-28 Siemens Aktiengesellschaft Distribution of electric energy on a vessel
US10084319B2 (en) * 2014-12-19 2018-09-25 Abb Schweiz Ag Power system comprising a central energy storage system and a method of controlling power transfer in a power system
US20200185917A1 (en) * 2017-04-07 2020-06-11 Siemens Aktiengesellschaft Distribution of electric energy on a vessel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9745038B2 (en) * 2014-07-11 2017-08-29 General Electric Company DC power system for marine applications
US10084319B2 (en) * 2014-12-19 2018-09-25 Abb Schweiz Ag Power system comprising a central energy storage system and a method of controlling power transfer in a power system
US20170373502A1 (en) * 2015-01-15 2017-12-28 Siemens Aktiengesellschaft Power distribution on a vessel
US20170373498A1 (en) * 2015-01-23 2017-12-28 Siemens Aktiengesellschaft Distribution of electric energy on a vessel
US20200185917A1 (en) * 2017-04-07 2020-06-11 Siemens Aktiengesellschaft Distribution of electric energy on a vessel

Also Published As

Publication number Publication date
US20240097453A1 (en) 2024-03-21

Similar Documents

Publication Publication Date Title
JP5465255B2 (ja) 船に電力を伝達するシステムおよび装置
US9065154B2 (en) Series connection of switching regulators for energy transfer in battery systems
EP3375063B1 (fr) Système électrique pour applications en mer
US20130313894A1 (en) Blackout Ride-Through System
US20170353038A1 (en) Power System Comprising A Central Energy Storage System And A Method Of Controlling Power Transfer In A Power System
KR20220083813A (ko) 전력 공급 시스템
KR102074065B1 (ko) 부하단에 배치된 변압기 및 ess를 가지는 선박용 dc기반 전력 공급 시스템
CN113056853A (zh) 用于涉水设施的能量供给系统
EP3944447A1 (fr) Sous-station d'accès flexible et son procédé de commande
KR102562066B1 (ko) 중복 전원 공급 시스템
US20240097453A1 (en) Galvanically isolated energy storage - tie inverter
CN101523691A (zh) 交流-直流变换装置
JP2010221888A (ja) 交流き電装置
CN110663152B (zh) 高度冗余的直流电压网络
CN217824286U (zh) 一种用于船舶的补偿供电装置及系统
CN220342050U (zh) 一种混合动力船舶的船侧岸电供电系统
CN110768366B (zh) 一种适用于非能动先进压水堆的氢点火器供电系统
JP2023127781A (ja) 陸上電力供給システム、陸上電力供給方法
EP4150730A1 (fr) Système de distribution d'énergie
Chen et al. Design of ship power system with exchangeable battery energy storage containers
JP2023127782A (ja) 陸上電力供給システム、陸上電力供給方法
CN113746098A (zh) 船舶配电系统与主系统
JP2021013248A (ja) 電力供給システム

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23868846

Country of ref document: EP

Kind code of ref document: A1

DPE2 Request for preliminary examination filed before expiration of 19th month from priority date (pct application filed from 20040101)